diff --git a/kiri-engine/Pool/Connection.php b/kiri-engine/Pool/Connection.php
index 263f9e20..69bd8f0f 100644
--- a/kiri-engine/Pool/Connection.php
+++ b/kiri-engine/Pool/Connection.php
@@ -25,6 +25,8 @@ class Connection extends Component
 
 	private array $master = [];
 
+	private int $total = 0;
+
 
 	/**
 	 * @param Pool $pool
@@ -150,7 +152,11 @@ class Connection extends Component
 	 */
 	public function create($config): Closure
 	{
-		return static function () use ($config) {
+		return function () use ($config) {
+			if ($this->total >= 300) {
+				return $this->pool->waite($config['cds'], 30);
+			}
+			$this->total += 1;
 			return new \Database\Mysql\PDO($config);
 		};
 	}
diff --git a/kiri-engine/Pool/Pool.php b/kiri-engine/Pool/Pool.php
index e2810563..6f7f3908 100644
--- a/kiri-engine/Pool/Pool.php
+++ b/kiri-engine/Pool/Pool.php
@@ -243,6 +243,19 @@ class Pool extends Component
 	}
 
 
+	/**
+	 * @param $name
+	 * @param int $time
+	 * @return array
+	 * @throws ConfigException
+	 */
+	public function waite($name, int $time = 30): mixed
+	{
+		return $this->channel($name)->pop($time);
+	}
+
+
+
 	/**
 	 * @param string $name
 	 * @throws Exception